Safety-valve



(No Model.)

P. J. & C. F. CUNNEEN.

SAFETY VALVE.

UNITED STATES PATENT OFFICE.

PETER J. OUNNEEN AND CORNELIUS E. OUNNEEN, OF NEI/V ROCHELLE,

NEW YORK.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 438,47' 1, dated October 14, 1890.

Application filed May 7, 1890. Serial No. 350,897. (No model.)

To a/ZZ whom it mayoncern..`

Be it known that we, PETER J. CUNNEEN and CORNELIUS F. CUNNEEN, both of New Rochelle, in the county of Westchester and State of New York, have invented a new and Improved Safety-Valve for Kitchen-Boilers, of which the following is a full, clear, and exact description.

The object of the invention is to provide a safety-valve forl kitchen-boilers, especially such boilers as receive their water-supply through a meter, in connection with which a check-valve is arranged between the boiler and meter, which prevents any undue pressure that may be developed in the boiler from expending its energy on the water in the main.

The invention consists in the novel form of valve hereinafter described and claimed, which is cheap and stable, in construction and may be readily adjusted without special skill, and to the interior of which ready access may be had for examining or renewing its parts.

Reference is to be had to the accompanying drawing, forming part 0f this specification, in which the figure represents a vertical sectional elevation of a safety-valve embodying my invention.

The shell or case of the'valve is formed in two sections A A', having threaded connection s, the lower member A of which is threaded at its lower end a for attachment to the boilerspud and formed with a branch or outlet B, which in practice is connected by a suitable union with the hot-water-delivery pipe B'.

The upper member A' of the shell is provided With an outlet or branch B2, which in practice is connected by a suitable union with an auxiliary outlet-pipe B3, which leads to a sink, trap, 0r other escape.

The upper reduced end of the member A forms a seat a', on which is seated a valve C, that controls communication between the lower and upper chambers 10 10a of the shell.

On the stem c of the valve C is formed an annular flange c', which forms a seat for a spiral springD, which tends normally to maintain the valve on its seat. The upper end of the spiral spring D abnts against the under side of the annular flange e of a plunger or follower E, against which follower pressure is its inner endV on the upper side of the fol lower E. The cap A2 is formed with an in ternally-threaded flange CL2, which engages the threaded upper end of the member A' of the g shell.

A knob F', having a milled edge, serves to turn the stem F to exert the desired pressure on the valve C.

A gage-standard G is secured to or formed upon the cap A2 and extends parallel with the screw-stem F in close proximity to the knob F" thereof, which standard in practice bears graduations indicating the pressure exerted by the spring in the various positions of the stem F.

Below the valve-seat the shell is formed with a radial frame or guide a3, through which passes a guide stem or extension O',that projects downwardly from the valve O, whereby the valve will be guided in its movements.

A packing-ring c2 is clamped against the under side of valve O by a nut c3.

In operation should the pressure in the boiler exceed the predetermined pressure exerted on the valve through the medium of the scre w-stem and spring the valve will be raised from its seat and the water will pass into the upperchamber l0 and out through outlet B2 and pipe B3 until the normal pressurein the boiler is restored.

The two-part shell and the screw-cap per mit ready access to the interior for examining and renewing any of the parts.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

l. In a safety-valve, the combination, with the shell formed in two parts A A', each having a branch, the member A being formed with a valveseat, of the screw-cap A2, closing the end of the member A', carrying the gagestandard G, the valve C, having the flange c', the spring D, bearing at one end against said flange, the follower E, against which the other end of said spring abuts, and the screw-stem F, working in a threaded aperture in the screw-cap and bearing against the follower E,

IOO

the said screw-cap affording access to the interior of the shell without the removal of the branch outlets or their connections, substantially as described.

2. In a safety-valve for kitchen-boilers, the combination, with the shell comprising the two members connected by a threaded connection, the one having a valve-seat and each having a branch 0r outlet, of a valve having an annular flange on its stem, a spiral spring seated on said ilange, a follower above said spring and having a flange against which the upper end of the spring abuts, a screw-cap on the upper member of the shell, a headed screw-stem working in said cap and bearing by its inner end against the said follower for exerting pressure on the spring, and a gagestandard extending from the screw-cap of the shell parallel with the screw-stem, or approximately so, and passing in close proximity to the head of said stem, substantially as described.

3. The combination, with a shell compris ing the two members A A', connected by a threaded connection, each having an outlet B B2, the member A having a screw-cap A2 and the member A having a reduced upper end that forms a valve-seat a', of a valve C, a spiral spring D, seated 011 said Valve, a follower E at the opposite end of said spring, a screwstem F, Working in the cap A2 and bearing by its inner end against the follower E for exerting pressure on the spring D, and a gagestandard G, projecting from the cap A2 at one side of the screw-stem F, substantially as described.

4. In a safety-Valve for kitchen-boilers, the combination, with the shell comprising the two members A A', connected by a threaded connection, each having an outlet B B2, the member A having a screw-cap A2 and the member A having a valve-seat a', of a valve C, having a downwardlyextending guidestem C', that is guided in aradial guide-frame a3 in the member A of the shell, a spiral spring D, seated onthe annular flan ge c of valve-stem c, the said valve-stem extending within the spring and centering its lower end, a follower E, extending Within the upper end of the spring for centering the same and formed with a flange c, against which the spring abuts, a screw-stem F, Working in the screw-cap A2 and bearing by its inner end against the follower E and provided with a knob or head F', and a gage-standard extending from the cap A2 at one side of the stern F and passing in close proximity to the head F thereof, substantially as described.

PETER J. CUNNEEN. CORNELIUS F. CUNNEEN.

Witnesses:

JOHN C. HALLIGAN, CHARLES BRADY. 

